From: David S. Miller <davem@davemloft.net>
Date: Tue, 5 Jul 2005 22:20:55 +0000 (-0700)
Subject: [TCP]: Do not call tcp_tso_acked() if no work to do.
X-Git-Tag: firefly_0821_release~43098^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cb83199a29dc0408423d6df432f28cc67fcadaf4;p=firefly-linux-kernel-4.4.55.git

[TCP]: Do not call tcp_tso_acked() if no work to do.

In tcp_clean_rtx_queue(), if the TSO packet is not even partially
acked, do not waste time calling tcp_tso_acked().

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 1dba7fd438da..b948e4eb39b7 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2038,7 +2038,8 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt
 		 * the other end.
 		 */
 		if (after(scb->end_seq, tp->snd_una)) {
-			if (tcp_skb_pcount(skb) > 1)
+			if (tcp_skb_pcount(skb) > 1 &&
+			    after(tp->snd_una, scb->seq))
 				acked |= tcp_tso_acked(sk, skb,
 						       now, &seq_rtt);
 			break;